. The Cambridge natural history. Zoology. 68 MYRIAPODA The first appearance of the mouth appendages has been ah-eady mentioned, and these are shown in Fig. 43, where the 0 ""^^IftP^"-. Fig. 42,âG', gut; , Malpighian tube ; , nerve cord; , deep invagiua- tiou by which the tracheae are formed ; 2/.s, yolk spherules still present ; L, first appearance of legs ; , part of mesoblast. (Heathcote, Post. Emb. Dev. of Jidus terresiris.) small stumps that later on change to jaws are shown. The figure shows the head of a young Chilog- nath seen from the lowe
. The Cambridge natural history. Zoology. 68 MYRIAPODA The first appearance of the mouth appendages has been ah-eady mentioned, and these are shown in Fig. 43, where the 0 ""^^IftP^"-. Fig. 42,âG', gut; , Malpighian tube ; , nerve cord; , deep invagiua- tiou by which the tracheae are formed ; 2/.s, yolk spherules still present ; L, first appearance of legs ; , part of mesoblast. (Heathcote, Post. Emb. Dev. of Jidus terresiris.) small stumps that later on change to jaws are shown. The figure shows the head of a young Chilog- nath seen from the lower side, and the second pair of stumps fuse together later on and produce the broad plate already mentioned as the characteristic mouth appendage of the Order. After the animal is hatched it has still, in the case of most Myriapods ''\erd^t^f;Lnfrj:'.':! (^^^^^ ^-^^^^^ ^-^ ^ot hatched with an rcsfrw .â ^TO.)«, rudimentary the segments Complete), to undergo a mouth pilte'â¢aâ¢aâ¢en°ua7 farther development, and in particular the eyes are still unformed. The pro- cess of development of the eye has only been followed out as yet in the Chilognatha, and in only one form, Julus, and is so curious that a short account may be of interest here. The develop- ment of the eye begins (in Julus) on the fourth day after hatch- ing, and continues until the animal is full grown. A single. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
